Revenue in the quarter was $642.0 million compared to $624.3 million in the second quarter last year. Revenue, net of subcontractor costs1, was $520.9 million, up 9.2% compared to $476.9 million in the second quarter last year. Earnings before interest, taxes, depreciation, and amortization (EBITDA2), were $54.2 million, up 10.1% compared to $49.2 million in the second quarter last year. Operating income was $37.7 million, up 6.0% compared to $35.5 million in the second quarter last year. Diluted earnings per share (EPS) were $0.38, up 8.6% compared to $0.35 in the second quarter last year. Backlog was $2.03 billion compared to $2.03 billion at the end of the second quarter last year. Cash generated from operations was $44.3 million, up 33.8% compared to $33.1 million in the second quarter last year.

Six-Month Results

Revenue for the six-month period was $1.30 billion compared to $1.31 billion in the year-ago period. Revenue, net of subcontractor costs, was $1.02 billion, up 5.1% compared to $968.9 million in the year-ago period. EBITDA were $108.3 million, up 8.0% compared to $100.3 million in the year-ago period. Operating income was $79.5 million, up 10.9% compared to $71.6 million in the year-ago period. Diluted EPS were $0.78, up 9.9% compared to $0.71 in the year-ago period. Cash generated from operations was $62.0 million compared to $71.4 million in year-ago period.

Tetra Tech's Chairman and CEO, Dan Batrack, commented, "We generated second quarter results that were in-line with our expectations and guidance. We continue to experience strong demand for our water and environmental services from commercial clients, especially with our oil & gas customers. U.S. commercial and international clients now represent 59% of our net revenue."

1 Tetra Tech's revenue includes a significant amount of subcontractor costs and, therefore, the Company believes revenue, net of subcontractor costs, which is a non-GAAP financial measure, provides a valuable perspective on its business results.

2 EBITDA is a non-GAAP financial measure. The Company believes EBITDA is a useful representation of operating performance because of significant amounts of acquisition-related non-cash amortization expense. A table reconciling net income attributable to Tetra Tech to EBITDA can be found at the end of this release.

In thousands (except EPS data)

Three Months Ended

Six Months Ended

March 31,

April 1,

March 31,

April 1,

2013

2012

2013

2012

Revenue

$

641,999

$

624,345

$

1,300,544

$

1,306,972

Subcontractor costs

(121,052

)

(147,453

)

(282,399

)

(338,024

)

Revenue, net of subcontractor costs

520,947

476,892

1,018,145

968,948

Operating income

37,667

35,543

79,476

71,635

Interest expense, net

(2,136

)

(1,453

)

(3,320

)

(2,763

)

Income tax expense

(10,659

)

(11,769

)

(24,888

)

(23,848

)

Net income including noncontrolling interests

24,872

22,321

51,268

45,024

Net income attributable to noncontrolling interests

(52

)

(37

)

(225

)

(130

)

Net income to Tetra Tech

$

24,820

$

22,284

$

51,043

$

44,894

Earnings per share attributable to Tetra Tech:

Basic

$

0.38

$

0.35

$

0.79

$

0.71

Diluted

$

0.38

$

0.35

$

0.78

$

0.71

Weighted-average common

shares outstanding:

Basic

64,551

63,072

64,376

62,846

Diluted

65,472

63,817

65,208

63,497

Business Outlook

The following statements are based on current expectations. These statements are forward-looking and the actual results could differ materially. These statements do not include the potential impact of transactions that may be completed or developments that become evident after the date of this release. The Business Outlook section should be read in conjunction with the information on forward-looking statements at the end of this release.

As Tetra Tech previously announced, due to anticipated weakness in Eastern Canada and mining, Tetra Tech is updating its guidance for fiscal 2013. Tetra Tech expects diluted EPS for the third quarter of fiscal 2013 to be in the range of $0.32 to $0.42. Revenue, net of subcontractor costs, for the third quarter is expected to range from $525 million to $575 million. For fiscal 2013, Tetra Tech now expects diluted EPS to be $1.60 to $1.75. Revenue, net of subcontractor costs, for fiscal 2013 is now expected to range from $2.15 billion to $2.25 billion.

Webcast

Investors will have the opportunity to access a live audio-visual webcast and supplemental financial information concerning the second quarter results through a link posted on the Company's website at www.tetratech.com on May 2, 2013 at 8:00 a.m. (PT).

Tetra Tech is a leading provider of consulting, engineering, program management, construction management, and technical services. The Company supports government and commercial clients by providing innovative solutions to complex problems focused on water, environment, energy, infrastructure, and natural resources. With more than 14,000 staff worldwide, Tetra Tech's capabilities span the entire project life cycle.

Tetra Tech, Inc.

Regulation G Information

Reconciliation of Net Income to EBITDA

In thousands

Three Months Ended

Six Months Ended

March 31,

April 1,

March 31,

April 1,

2013

2012

2013

2012

Net income attributable to Tetra Tech

$

24,820

$

22,284

$

51,043

$

44,894

Interest expense, net

2,136

1,453

3,320

2,763

Income tax expense

10,659

11,769

24,888

23,848

Depreciation

7,522

6,794

14,330

13,580

Amortization

9,051

6,917

14,684

15,182

EBITDA

$

54,188

$

49,217

$

108,265

$

100,267

Forward-Looking Statements

This news release contains forward-looking statements that are subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include information concerning future events and the future financial performance of Tetra Tech that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results. Readers are urged to read the documents filed by Tetra Tech with the SEC, specifically the most recent reports on Form 10-K, 10-Q, and 8-K, each as it may be amended from time to time, which identify risk factors that could cause actual results to differ materially from the forward-looking statements. Among the important factors or risks that could cause actual results or events to differ materially from those in the forward-looking statements in this release are:worldwide political and economic uncertainties; the effect of the Budget Control Act of 2011; fluctuations in annual revenue, expenses and operating results; the cyclicality in demand for U.S. state and local government and U.S. commercial services; credit risks associated with certain U.S. commercial clients; concentration of revenues from U.S. government agencies and potential funding disruptions by these agencies; violations of U.S. government contractor regulations; dependence on winning or renewing U.S. federal, state and local government contracts; the delay or unavailability of public funding on U.S. government contracts; the U.S. government's right to modify, delay, curtail or terminate contracts at its convenience; risks associated with international operations; the failure to properly manage projects; the loss of key personnel or the inability to attract and retain qualified personnel; the use of estimates and assumptions in the preparation of financial statements; the ability to maintain adequate workforce utilization; the use of the percentage-of-completion method of accounting; the inability to accurately estimate contract risks, revenue and costs; the failure to win or renew contracts with private and public sector clients; acquisition strategy and integration risks; goodwill or other intangible asset impairment; growth strategy management; backlog cancellation and adjustments; the failure of partners to perform on joint projects; the failure of subcontractors to satisfy their obligations; requirements to pay liquidated damages based on contract performance; changes in resource management, environmental or infrastructure industry laws, regulations or programs; changes in capital markets and the access to capital; credit agreement covenants; industry competition; liability related to legal proceedings; the availability of third-party insurance coverage; the ability to obtain adequate bonding; employee, agent or partner misconduct; employee risks related to international travel; safety programs; conflict of interest issues; liabilities relating to reports and opinions; liabilities relating to environmental laws and regulations; force majeure events; protection of intellectual property rights; the interruption of computer, information and communications technology and systems; the ability to impede a business combination based on Delaware law and charter documents; and stock price volatility. Any projections in this release are based on limited information currently available to Tetra Tech, which is subject to change. Although any such projections and the factors influencing them will likely change, Tetra Tech will not necessarily update the information, since Tetra Tech will only provide guidance at certain points during the year. Readers should not place undue reliance on forward-looking statements since such information speaks only as of the date of this release.